True. There's a whole debate about determinism in the universe, which includes radioactive decay. It's just one of those things that's considered roughly as random as it gets.
That's not really true. The Bells inequality experiments have proven (falsified) that there are no local hidden variables. The vast majority of scientists are not willing to throw away causality by accepting nonlocal hidden variables.
In other words the true randomness of quantum Events has been broadly accepted to reflect reality.
In other words the true randomness of quantum Events has been broadly accepted to reflect reality.